U.S. patent number 10,293,392 [Application Number 15/127,265] was granted by the patent office on 2019-05-21 for coiler device provided with chute guide.
This patent grant is currently assigned to JFE STEEL CORPORATION, PRIMETALS TECHNOLOGIES JAPAN, LTD.. The grantee listed for this patent is JFE STEEL CORPORATION, PRIMETALS TECHNOLOGIES JAPAN, LTD.. Invention is credited to Koichi Arai, Takeshi Chiba, Takayuki Endo, Hiroshi Matsumoto, Tsutomu Sugiyama, Takao Uchiyama.
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United States Patent |
10,293,392 |
Matsumoto , et al. |
May 21, 2019 |
Coiler device provided with chute guide
Abstract
This coiler device provided with a chute guide has: pinch
rollers that lead a metal sheet carried in along a path line to a
coil-up line that is curved from the path line; a mandrel that is
disposed ahead of the coil-up line and coils up the metal sheet;
and a chute guide that guides the upward-facing surface side of the
metal sheet at the coil-up line and introduces the metal sheet to
the coil-up opening of the mandrel. A configuration is adopted such
that the chute guide has: a main body frame; and a liner that is
attached to the main body frame, forms at least a portion of the
guide surface that guides the metal sheet, has a lower coefficient
of friction than the main body frame, and has a lower hardness than
the metal sheet.
Inventors: |
Matsumoto; Hiroshi (Hiroshima,
JP), Arai; Koichi (Hiroshima, JP), Endo;
Takayuki (Tokyo, JP), Uchiyama; Takao (Tokyo,
JP), Sugiyama; Tsutomu (Tokyo, JP), Chiba;
Takeshi (Tokyo, JP) |
Applicant: |
Name |
City |
State |
Country |
Type |
PRIMETALS TECHNOLOGIES JAPAN, LTD.
JFE STEEL CORPORATION |
Tokyo
Tokyo |
N/A
N/A |
JP
JP |
|
|
Assignee: |
PRIMETALS TECHNOLOGIES JAPAN,
LTD. (Tokyo, JP)
JFE STEEL CORPORATION (Tokyo, JP)
|
Family
ID: |
54144668 |
Appl.
No.: |
15/127,265 |
Filed: |
March 18, 2015 |
PCT
Filed: |
March 18, 2015 |
PCT No.: |
PCT/JP2015/057978 |
371(c)(1),(2),(4) Date: |
September 19, 2016 |
PCT
Pub. No.: |
WO2015/141704 |
PCT
Pub. Date: |
September 24, 2015 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20170106423 A1 |
Apr 20, 2017 |
|
Foreign Application Priority Data
|
|
|
|
|
Mar 20, 2014 [JP] |
|
|
2014-059067 |
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B21C
47/3433 (20130101); B21C 47/06 (20130101); B21C
47/3441 (20130101) |
Current International
Class: |
B21C
47/34 (20060101); B21C 47/06 (20060101) |
Field of
Search: |
;72/146,148 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
198 36 177 |
|
Mar 1999 |
|
DE |
|
64-6977 |
|
Feb 1989 |
|
JP |
|
2001-191114 |
|
Jul 2001 |
|
JP |
|
2005-305452 |
|
Nov 2005 |
|
JP |
|
2012-250283 |
|
Dec 2012 |
|
JP |
|
Other References
Extended European Search Report dated Nov. 8, 2017 in corresponding
European Application No. 15764495.6. cited by applicant .
Office Action dated Jan. 2, 2018 issued in the corresponding
Chinese Application No. 201580014849.7 with an English Translation.
cited by applicant .
Korean Office Action dated May 9, 2018 issued in corresponding
Korean Application No. 2016-7025460 with an English Translation.
cited by applicant .
Korean Office Action dated Nov. 13, 2017 issued in corresponding
Korean Application No. 2016-7025460 with an English Translation.
cited by applicant.
|
Primary Examiner: Sullivan; Debra M
Attorney, Agent or Firm: Birch, Stewart, Kolasch &
Birch, LLP
Claims
The invention claimed is:
1. A coiler device provided with a chute guide, comprising: a pinch
roller configured to guide a metal strip being conveyed along a
pass line to a winding line bent from the pass line; a mandrel
disposed ahead of the winding line and configured to wind up the
metal strip; and a chute guide configured to guide an upper surface
side of the metal strip in the winding line, and to introduce the
metal strip into a winding port of the mandrel, wherein the chute
guide comprises a body frame; a liner being attached to a
downstream end of the body frame in the winding line, said liner
constituting at least part of a guide surface to guide the metal
strip, said liner having a lower friction coefficient than a
friction coefficient of the body frame and a lower hardness than a
hardness of the metal strip; and an attachment unit configured to
detachably attach the liner to the body frame, and wherein the
attachment unit includes: a frame body provided to the body frame,
a slide groove provided in the liner, a slide piece configured to
be engaged with the slide groove, and to sandwich the frame body in
conjunction with the liner, and a screw member configured to fasten
and fix the slide piece to the liner.
2. The coiler device provided with a chute guide according to claim
1, wherein the slide piece includes an engagement protrusion
configured to be engaged with the slide groove, and the slide
groove includes a first opening opened with a larger width than a
width of the engagement protrusion, and a second opening opened
with a smaller width than the width of the engagement
protrusion.
3. The coiler device provided with a chute guide according to claim
2, wherein the liner includes a plurality of pieces arranged in a
width direction of the winding line, and the plurality of pieces
are detachably attached to the body frame independently of each
other.
4. The coiler device provided with a chute guide according to claim
1, wherein the liner includes a plurality of pieces arranged in a
width direction of the winding line, and the plurality of pieces
are detachably attached to the body frame independently of each
other.
5. The coiler device provided with a chute guide according to claim
1, wherein the liner is attached only at a downstream end of the
body frame in the winding line.
6. The coiler device provided with a chute guide according to claim
1, wherein the liner extends beyond the downstream end of the body
frame in the winding line.
Description
TECHNICAL FIELD
The present invention relates to a coiler device provided with a
chute guide.
BACKGROUND ART
In general, a coiler device (a winder) is provided on an exit side
of a rolling line, and is configured to wind a metal strip (a
strip) into a coil shape, where the metal strip is rolled by a
rolling mill and continuously supplied from a gap between rollers.
The coiler device is provided with pinch rollers located on a pass
line for the metal strip, and is configured to cause the pinch
rollers to guide the metal strip to a winding line which is bent
obliquely downward from the pass line, to allow a leading end of
the metal strip to be caught by a mandrel, and to wind up the metal
strip (see Patent Document 1).
Patent Document 1 cited below discloses a method and an apparatus
for winding a strip, which are designed to wind a rolled strip
around a mandrel through pinch rollers. The coiler device includes
a chute and an over-guide (a chute guide) which introduce a metal
strip into a winding port that is formed by the mandrel and a
wrapper roller. The over-guide is configured to function as a guide
plate which guides an upper surface side of the metal strip
introduced into the winding line.
PRIOR ART DOCUMENT
Patent Document
Patent Document 1: Japanese Patent Application Publication No.
2005-305452
SUMMARY OF THE INVENTION
Problem to be Solved by the Invention
In the meantime, after having passed through the pinch rollers, the
metal strip is guided to the mandrel while deflecting its passing
angle obliquely downward. Here, if the metal strip is a
high-strength thick material, the metal strip is not bent very much
due to its high bending stiffness, and is therefore thrust hard
against the chute guide that guides the upper surface side of the
metal strip in the winding line. As a consequence, a surface of the
metal strip is vulnerable to flaws and frictional resistance
thereon is increased as well. Hence, a large pushing force is
required and energy consumption is also increased accordingly.
The present invention has been made in view of the above-mentioned
problem. An object of the present invention is to provide a coiler
device provided with a chute guide, which is capable of preventing
occurrence of flaws on a surface of a metal strip and stabilizing
strip passage even when the metal strip is a high-strength thick
material.
Means for Solving the Problems
In order to solve the problem described above, the present
invention adopts a configuration of a coiler device provided with a
chute guide, characterized by: a pinch roller configured to guide a
metal strip being conveyed along a pass line to a winding line bent
from the pass line; a mandrel disposed ahead of the winding line
and configured to wind up the metal strip; and a chute guide
configured to guide an upper surface side of the metal strip in the
winding line, and to introduce the metal strip into a winding port
of the mandrel. The chute guide includes a body frame, and a liner
being attached to the body frame, constituting at least part of a
guide surface to guide the metal strip, and having a lower friction
coefficient than a friction coefficient of the body frame and a
lower hardness than a hardness of the metal strip.
As a consequence of adopting this configuration, in the present
invention, at least part of the guide surface is formed from the
liner having the lower friction than that of the body frame
constituting the chute guide and having the lower hardness than
that of the metal strip. The presence of the liner can reduce
frictional resistance on the guide surface. Accordingly, it is
possible to reduce energy consumption since it is not necessary to
apply a very large pushing force to the metal strip. Moreover,
since the liner has the lower hardness than that of the metal
strip, it is the liner which is scraped off when the metal strip is
thrust thereon. Thus, a surface of the metal strip is prevented
from the occurrence of flaws (from being scraped off).
In addition, the present invention adopts a configuration in which
the liner is attached to a downstream side of the body frame in the
winding line.
As a consequence of adopting this configuration, in the present
invention, in the winding line, the downstream side of the chute
guide being close to a winding port of the mandrel rubs against the
metal strip for a longer period than does the upstream side
thereof. Accordingly, by attaching the liner to the downstream side
of the body frame, it is possible to effectively prevent an
increase in frictional resistance on the guide surface and to
prevent the occurrence of flaws on the surface of the metal
strip.
In addition, the present invention adopts a configuration in which
the coiler device includes an attachment unit configured to
detachably attach the liner to the body frame.
As a consequence of adopting this configuration, in the present
invention, it is possible to replace only the liner which rubs
against the metal strip and gradually wears away. Thus, replacement
workability is improved as compared to a case of replacing the
liner together with the body frame, and a replacement cost can be
reduced as well.
In addition, the present invention adopts a configuration in which
the attachment unit includes: a frame body provided to the body
frame; a slide groove provided in the liner; a slide piece
configured to be engaged with the slide groove, and to sandwich the
frame body in conjunction with the liner; and a screw member
configured to fasten and fix the slide piece to the liner.
As a consequence of adopting this configuration, in the present
invention, the liner can be detached from the frame body provided
to the body frame by releasing fastening and fixation with the
screw member and then moving the slide piece along the slide groove
of the liner to release engagement with the liner. Accordingly,
even if the fastening and fixation by the screw member is released,
for instance, the liner remains supported by the body frame unless
the engagement of the slide piece with the liner is released. Thus,
it is possible to surely avoid a circumstance such as the liner
being unexpectedly falling off and getting caught in the metal
strip.
In addition, the present invention adopts a configuration in which
the slide piece includes an engagement protrusion configured to be
engaged with the slide groove, and the slide groove includes a
first opening opened with a larger width than a width of the
engagement protrusion, and a second opening opened with a smaller
width than the width of the engagement protrusion.
As a consequence of adopting this configuration, in the present
invention, the slide piece and the liner can be easily brought into
engagement with each other by introducing the engagement protrusion
of the slide piece from the first opening into the slide groove and
then causing the engagement protrusion to slide to the second
opening.
In addition, the present invention adopts a configuration in which
the liner includes a plurality of pieces arranged in a width
direction of the winding line, and the plurality of pieces are
detachably attached to the body frame independently of each
other.
As a consequence of adopting this configuration, in the present
invention, when the metal strip is rolled out of a rolling mill, a
shape of a leading end of the metal strip often fails to be aligned
straight, and the liner may be worn unevenly in the width
direction. Hence, by forming the liner from the multiple pieces so
as to be replaceable partially in terms of the width direction, it
is possible to further reduce the replacement cost.
Effect of the Invention
According to the present invention, it is possible to obtain a
coiler device provided with a chute guide, which is capable of
preventing occurrence of flaws on a surface of a metal strip and
stabilizing strip passage even when the metal strip is a
high-strength thick material.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an overall configuration diagram showing a coiler device
according to an embodiment of the present invention.
FIG. 2 is a perspective view of a chute guide according to the
embodiment of the present invention, which is viewed from a back
side.
FIG. 3 is a cross-sectional view taken along and viewed in a
direction of arrows I-I in FIG. 2.
FIG. 4 is an exploded perspective view showing attachment units
according to the embodiment of the present invention.
FIG. 5 is a perspective view showing a liner according to the
embodiment of the present invention.
FIG. 6 is a perspective view showing a slide piece according to the
embodiment of the present invention.
FIG. 7 is a diagram for explaining a winding operation of the
coiler device and an action of the chute guide according to the
embodiment of the present invention.
FIG. 8 is an overall configuration diagram showing a coiler device
according to another embodiment of the present invention.
MODES FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with
reference to the drawings.
FIG. 1 is an overall configuration diagram showing a coiler device
1 according to an embodiment of the present invention.
As shown in FIG. 1, the coiler device 1 is disposed on a downstream
side of a not-illustrated rolling mill, and is configured to
introduce a metal strip 2, which passes through the rolling mill
and is conveyed along a pass line L1, to a winding line L2 and
thereby winding up the metal strip 2. The pass line L1 is defined
by multiple conveyance rollers 3 that are arranged
horizontally.
The coiler device 1 includes pinch rollers 10a and 10b. The pinch
rollers 10a and 10b are designed to guide the metal strip 2, which
is conveyed along the pass line L1, to the winding line L2 that is
bent from the pass line L1. The winding line L2 extends obliquely
downward from the pass line L1. The upper pinch roller 10a is made
capable of approaching and receding from the lower pinch roller
10b. The upper pinch roller 10a is designed to recede from the
lower pinch roller 10b except in the case of winding the metal
strip 2 around a mandrel 20 to be described below.
The coiler device 1 includes the mandrel 20. The mandrel 20 is
disposed ahead of the winding line L2 and designed to wind up the
metal strip 2. Multiple wrapper rollers 21 and wrapper aprons 22
are provided around the mandrel 20. The wrapper rollers 21 are
provided for wrapping the metal strip 2 around the mandrel 20. The
wrapper rollers 21 are disposed at intervals in a circumferential
direction of the mandrel 20. The wrapper rollers 21 are made
capable of approaching and receding from the mandrel 20. The
wrapper rollers 21 are designed to move in conformity with a
diameter of the metal strip 2 wrapped around the mandrel 20.
The wrapper aprons 22 are designed to lead a leading end of the
metal strip 2 when the metal strip 2 is wrapped around the mandrel
20. Each wrapper apron 22 has a guide surface 22a, which is opposed
to a peripheral surface of the mandrel 20, and allows the leading
end of the metal strip 2 to come into contact therewith. The guide
surface 22a is curved along the peripheral surface of the mandrel
20. Each wrapper apron 22 is disposed in a space between two
corresponding wrapper rollers 21 adjacent to each other in the
circumferential direction of the mandrel 20. The wrapper aprons 22
are made capable of approaching and receding from the mandrel 20.
The wrapper aprons 22 are designed to recede from the mandrel 20
when the metal strip 2 is wrapped therearound.
The coiler device 1 includes a gate 30. The gate 30 is configured
to open and close the winding line L2 (FIG. 1 shows an open state).
The gate 30 is disposed on an exit side of the pinch rollers 10a
and 10b. The gate 30 includes a first guide surface 31 that defines
the pass line L1, and a second guide surface 32 that defines the
winding line L2. The first guide surface 31 is formed into a
horizontal surface extending along the pass line L1. The second
guide surface 32 is formed into an inclined surface extending along
the winding line L2. The gate 30 has a structure in which a tip end
of a substantially V shape is directed to an upstream side of the
pass line L1.
The gate 30 defines the winding line L2 in conjunction with chute
guides 40a and 40b. The chute guides 40a and 40b are designed to
guide the leading end of the metal strip 2 to the winding port 23
between the mandrel 20 and the corresponding wrapper roller 21. The
chute guides 40a and 40b are arranged in a downward tapered fashion
such that a clearance therebetween is gradually narrowed toward the
catch part between the mandrel 20 and the wrapper roller 21. The
chute guides 40a and 40b are disposed on a downstream side of the
gate 30 in the winding line L2. In this embodiment, the lower chute
guide 40b is provided integrally with one of the wrapper aprons 22.
Meanwhile, the upper chute guide 40a is provided turnably about a
rotating shaft 41.
The coiler device 1 includes a chute roller 50. The chute roller 50
is configured to suppress a deformation of the metal strip 2 in
such a way as to be curved toward its upper surface side when the
leading end of the metal strip 2 is wrapped around the mandrel 20.
The chute roller 50 is disposed at a position corresponding to a
joint between the gate 30 and the upper chute guide 40a, which is
disposed on the downstream side of the gate 30 on the winding line
L2. The chute roller 50 is rotatably provided and its peripheral
surface projects from the second guide surface 32.
The coiler device 1 includes a bending roller 60. The bending
roller 60 is disposed on an upstream side of the pinch rollers 10a
and 10b, and is made capable of approaching and receding from the
pass line L1 by use of a bending roller drive device 61. The
bending roller 60 is configured to approach the pass line L1 when
the rolling of the metal strip 2 is about to finish, so as to
prevent its trailing end from bouncing up. The bending roller drive
device 61 is formed from a cylinder device, for example.
Next, a configuration of the chute guide 40a will be described in
detail while additionally referring to FIG. 2 to FIG. 6.
FIG. 2 is a perspective view of the chute guide 40a according to
the embodiment of the present invention, which is viewed from a
back side. FIG. 3 is a cross-sectional view taken along and viewed
in a direction of arrows I-I in FIG. 2. FIG. 4 is an exploded
perspective view showing attachment units 73 according to the
embodiment of the present invention. FIG. 5 is a perspective view
showing a liner 72 according to the embodiment of the present
invention. FIG. 6 is a perspective view showing a slide piece 76
according to the embodiment of the present invention.
The chute guide 40a is configured to guide the upper surface side
of the metal strip 2 introduced into the winding line L2 (see FIG.
1), and to introduce the metal strip 2 into the winding port 23 of
the mandrel 20. The chute guide 40a includes a body frame 70. A
front side of the body frame 70 forms a guide surface 42 that
guides the upper surface side of the metal strip 2. As shown in
FIG. 2, multiple reinforcement ribs 71 are provided on a back side
of the body frame 70.
The chute guide 40a includes the liner 72. As shown in FIG. 1, the
liner 72 is attached to the body frame 70, and constitutes at least
part of the guide surface 42 that guides the metal strip 2. The
liner 72 is formed from a low friction material having a lower
friction coefficient than that of the body frame 70, which is also
a low hardness material having a lower hardness than that of the
metal strip 2. The liner 72 of this embodiment is made of an FCD
(ductile cast iron) material, for example.
As shown in FIG. 1, the liner 72 is attached to a downstream side
of the body frame 70 in the winding line L2. The liner 72 of this
embodiment forms a portion of the guide surface 42 that accounts
for about one-fifth starting from a downstream end of the body
frame 70. A downstream end of the liner 72 projects from the
downstream end of the body frame 70 and is disposed in proximity to
a peripheral surface of the first wrapper roller 21. Moreover, as
shown in FIG. 2, the liner 72 is formed from multiple pieces 72a
arranged in a width direction of the winding line L2. The liner 72
of this embodiment adopts a configuration including four pieces
72a, so that each of the four pieces 72a is independently
replaceable.
As shown in FIG. 3, the chute guide 40a includes attachment units
73. The attachment units 73 are configured to detachably attach the
liner 72 to the body frame 70. The attachment units 73 of this
embodiment are configured to detachably attach the respective
pieces 72a of the liner 72 to the body frame 70 independently of
one another (see FIG. 2 and FIG. 4). Each attachment unit 73
includes a frame body 74, a slide groove 75, slide pieces 76, and
screw members 77.
As shown in FIG. 4, the frame body 74 is provided to the body frame
70. Specifically, the frame body 74 is provided on the downstream
side of the body frame 70 in the winding line L2, and forms an
integral structure with the body frame 70. A fitting hole 74a in a
convex shape with its leading end directed to the downstream side
of the winding line L2 is formed on an inner side of the frame body
74. The fitting hole 74a is formed between the reinforcement ribs
71 that are adjacent to each other.
The slide groove 75 is provided in the liner 72 as shown in FIG. 4.
The liner 72 includes a convex projection 78 to be fitted into the
fitting hole 74a of the frame body 74. The slide groove 75 is
formed in the projection 78. Screw holes 79 to be threadedly
engaged with the screw members 77 are formed in the projection 78.
The screw holes 79 are formed at four positions in total, namely,
at two positions each while interposing the slide groove 75 in
between. As shown in FIG. 3, the screw holes 79 are formed so as
not to penetrate or reach the guide surface 42.
As shown in FIG. 3, each slide piece 76 is configured to be engaged
with the slide groove 75, and to sandwich the frame body 74 in
conjunction with the liner 72. As shown in FIG. 4, this embodiment
adopts a configuration in which the two slide pieces 76 are engaged
with the single slide groove 75. Each slide piece 76 includes an
engagement protrusion 80 to be engaged with the slide groove 75. As
shown in FIG. 3, the engagement protrusion 80 is formed into a
T-shape in a cross-sectional view. Specifically, as shown in FIG.
6, the engagement protrusion 80 is formed from a head portion 80a
having a large width, and a neck portion 80b having a smaller
width. The slide piece 76 includes insertion holes 81 to allow
insertion of the screw members 77, which are formed at two
positions in total, namely, at one position each while interposing
the engagement protrusion 80 in between.
As shown in FIG. 5, the slide groove 75 includes a first opening 82
which is opened at a large width, and second openings 83 which are
opened at a small width. The first opening 82 enables introduction
of the engagement protrusion 80 of the slide piece 76, and is
opened at a larger width than a width of the engagement protrusion
80 (the head portion 80a). In the meantime, the second openings 83
enable engagement with the engagement protrusion 80 of the slide
piece 76, and are opened at a smaller width than the width of the
engagement protrusion 80 (the head portion 80a). Note that hooks
are fitted into holes 84 shown in FIG. 5 at the time of slinging up
the liner 72.
The first opening 82 is disposed at a central part of the slide
groove 75 while the second openings 83 are disposed on two end
portions of the slide groove 75. Each second opening 83 is
configured to reduce an opening width of the slide groove 75 down
to the width of the neck portion 80b of the engagement protrusion
80. As shown in FIG. 3, the two end portions of the slide groove 75
are formed into a T-shape in a cross-sectional view so as to
correspond to the engagement protrusion 80, thereby enabling the
engagement with the slide pieces 76. The liner 72 and the slide
pieces 76 are formed greater than the fitting hole 74a, so that the
frame body 74 can be sandwiched from the front and the back by
engaging the liner 72 with the slide pieces 76.
The screw members 77 are configured to fasten and fix the slide
pieces 76 to the liner 72. Each screw member 77 passes through the
insertion hole 81 and is threadedly engaged with the screw hole 79,
thereby preventing disengagement while restricting movement of the
slide piece 76 along the slide groove 75, and constricting the
frame body 74 between the liner 72 and the slide piece 76 at the
same time. As shown in FIG. 2, the screw members 77 fasten and fix
the slide piece 76 at the two positions. Note that in this
embodiment, the screw members 77 are connected to each other with
wiring 85 so as to keep them from turning and loosening.
Next, an operation to wind the metal strip 2 by the coiler device 1
having the above-described configuration and an action of the chute
guide 40a will be described with reference to FIG. 7. Note that a
description is given below of a case where the metal strip 2 is a
high-strength thick material.
FIG. 7 is a diagram for explaining a winding operation of the
coiler device 1 and an action of the chute guide 40a according to
the embodiment of the present invention.
As shown in FIG. 7, the metal strip 2 having passed through the
not-illustrated rolling mill is conveyed along the pass line L1 and
reaches the pinch rollers 10a and 10b. After having passed through
the pinch rollers 10a and 10b, the metal strip 2 changes its
passing angle obliquely downward and is hence guided to the winding
line L2 which is bent from the pass line L1. Here, when the metal
strip 2 is the high-strength thick material, its leading end is not
bent enormously but is instead curved in such a way as to draw an
arc. As a consequence, the metal strip 2 is thrust against the
chute guide 40a in the winding line L2.
The chute guide 40a includes the guide surface 42 which guides the
upper surface side of the metal strip 2 introduced into the winding
line L2. At least part of the guide surface 42 is formed from the
liner 72. The liner 72 is made of the low friction material having
the lower friction coefficient than that of the body frame 70
constituting the chute guide 40a, and thus reduces frictional
resistance against the metal strip 2. In this way, by attaching the
liner 72 to the body frame 70 and reducing the frictional
resistance on the guide surface 42, it is possible to reduce energy
consumption since it is not necessary to apply a very large pushing
force to the metal strip 2.
Moreover, since the liner 72 is made of the low hardness material
having the lower hardness than that of the metal strip 2, it is the
liner 72 which is scraped off when the metal strip 2 is thrust
thereon. Thus, the surface of the metal strip 2 is prevented from
the occurrence of flaws (from being scraped off). Accordingly, in
this embodiment, at least part of the guide surface 42 is formed
from the liner 72 having the lower friction than that of the body
frame 70 constituting the chute guide 40a and having the lower
hardness than that of the metal strip 2. Thus, it is possible to
reduce the frictional resistance, to stabilize strip passage
without the need to apply a large pushing force to the metal strip
2, and meanwhile, to prevent the occurrence of flaws on the surface
of the metal strip 2 by abrading the liner 72 side.
As shown in FIG. 7, the leading end of the metal strip 2 introduced
into the winding line L2 is thrust at the body frame 70.
Thereafter, the metal strip 2 is thrust at the liner 72 disposed on
the downstream side of the winding line L2, then passes through the
winding port 23, and is wound around the mandrel 20. When the metal
strip 2 is the high-strength thick material, as the metal strip 2
is wound around the mandrel 20 one time, a downstream side thereof
is lifted up by its leading end that gets into a bottom side.
Hence, the metal strip 2 will remain thrust at the downstream side
of the chute guide 40a for some time while being wound around the
mandrel 20.
As described above, in the winding line L2, the metal strip 2 is
thrust on the downstream side of the chute guide 40a for a longer
period than is thrust on the upstream side thereof. The liner 72 of
this embodiment is attached to the downstream side of the body
frame 70 in the winding line L2. According to this configuration,
it is possible to effectively prevent an increase in frictional
resistance on the guide surface 42 on the downstream side, which is
close to the winding port 23 of the mandrel 20 and rubs against the
metal strip 2 for a long period, and to effectively prevent the
occurrence of flaws on the surface of the metal strip 2.
Meanwhile, the liner 72 of this embodiment is detachably attached
to the body frame 70 by using the attachment units 73. Accordingly,
it is possible to replace only the liner 72, which rubs against the
metal strip 2 and gradually wears away, separately from the body
frame 70. As a consequence, replacement workability is improved as
compared to the case of replacing the liner 72 together with the
body frame 70, and a replacement cost can be reduced as well.
Moreover, as shown in FIG. 2, the liner 72 is formed from the
multiple pieces 72a arranged in the width direction of the winding
line L2, and the multiple pieces 72a are detachably attached to the
body frame 70 independently of one another. A weight of each of the
pieces 72a is obviously lighter than a total weight of the liner
72, and it is therefore easy to conduct replacement work.
In the meantime, when the metal strip 2 is rolled out of the
not-illustrated rolling mill, the shape of the leading end of the
metal strip 2 often fails to be aligned straight. Accordingly, when
the leading end of the metal strip 2 is thrust at the chute guide
40a, the liner 72 may be worn unevenly in the width direction. In
this embodiment, the liner 72 is formed from the multiple pieces
72a so as to be replaceable partially in terms of the width
direction, thereby allowing the replacement of only the unevenly
worn part, for example. As a consequence, it is possible to further
reduce the replacement cost for the liner 72.
The attachment of the liner 72 of this embodiment is conducted as
illustrated in FIG. 4. First, the liner 72 is slung up with a wire
and the projection 78 is fitted from a top side of the frame body
74 into the fitting hole 74a. Next, the slide pieces 76 are brought
into engagement with the slide groove 75 from a back side of the
frame body 74. Specifically, the engagement protrusion 80 of each
slide piece 76 is introduced from the first opening 82 into the
slide groove 75, and is then caused to slide to the second opening
83. Thus, the slide piece 76 and the liner 72 are engaged with each
other. After the slide pieces 76 are brought into engagement with
the two end portions of the slide groove 75, respectively, the
slide pieces 76 are fastened and fixed to the liner 72 by using the
screw members 77. In this way, the attachment of the liner 72 is
completed.
The detachment of the liner 72 is conducted in a reverse procedure
to the above-described attachment. Specifically, the fastening and
fixation by the screw members 77 is released and then the slide
pieces 76 are moved along the slide groove 75 of the liner 72 to
release the engagement with the liner 72. Thus, the liner 72 can be
detached from the frame body 74 provided to the body frame 70.
As shown in FIG. 3, according to the configuration of the
attachment units 73, even if the fastening and fixation by the
screw members 77 is released, for instance, the liner 72 remains
supported by the body frame 70 unless the engagement of the slide
pieces 76 with the liner 72 is released. As a consequence, at the
time of the replacement, it is possible to surely avoid an
unforeseen circumstance such as the liner 72 unexpectedly falling
off and either getting caught in the metal strip 2 or colliding
with a peripheral device, and thus to perform the replacement work
safely and reliably.
In this way, the above-described embodiment adopts the
configuration of the coiler device 1 provided with the chute guide
40a, including: the pinch rollers 10a and 10b configured to guide
the metal strip 2, which is conveyed along the pass line L1, to the
winding line L2 bent from the pass line L1; the mandrel 20 disposed
ahead of the winding line L2 and configured to wind up the metal
strip 2; and the chute guide 40a configured to guide the upper
surface side of the metal strip 2 in the winding line L2, and to
introduce the metal strip 2 into the winding port 23 of the mandrel
20, in which the chute guide 40a includes the body frame 70, and
the liner 72 being attached to the body frame 70, constituting at
least part of the guide surface 42 that guides the metal strip 2,
and having the lower friction coefficient than that of the body
frame 70 and the lower hardness than that of the metal strip 2.
Thus, it is possible to obtain the coiler device 1 provided with
the chute guide 40a, which is capable of preventing occurrence of
flaws on the surface of the metal strip 2 and stabilizing strip
passage even when the metal strip 2 is the high-strength thick
material.
The preferred embodiment of the present invention has been
described above with reference to the drawings. It is to be
understood, however, that the present invention is not limited only
to the above-described embodiment. The shapes, combinations, and
other features of the respective constituents shown in the
above-described embodiment are mere examples, and various
modifications based on design requirements and the like are
possible within the range not departing from the gist of the
present invention.
For example, the present invention may adopt the following aspect
shown in FIG. 8. Note that in the following description,
constituents which are identical or similar to those in the
above-mentioned embodiment will be denoted by the same reference
numerals and the description thereof will be either simplified or
omitted.
FIG. 8 is an overall configuration diagram showing the coiler
device 1 according to another embodiment of the present
invention.
As shown in FIG. 8, the liner 72 of the other embodiment
constitutes a downstream end of the chute guide 40a. The liner 72
is detachably attached to the body frame 70 by using the attachment
units 73 formed from screw members 86. This configuration makes it
possible to secure a thickness of the liner 72 and to ensure a
large scrape margin. Thus, it is possible to reduce the frequency
of replacement of the liner 72. It is to be noted, however, that
the weight of the liner 72 becomes larger than that in the
above-described embodiment.
Meanwhile, for example, the embodiments have described the
configuration in which the liner is formed from the multiple
pieces. However, the present invention is not limited only to this
configuration. For instance, the liner may be formed from a single
piece.
EXPLANATION OF REFERENCE NUMERALS
1 coiler device 2 metal strip 10a, 10b pinch roller 20 mandrel 23
winding port 40a chute guide 42 guide surface 70 body frame 72
liner 72a piece 73 attachment unit 74 frame body 75 slide groove 76
slide piece 77 screw member 80 engagement protrusion 82 first
opening 83 second opening L1 pass line L2 winding line
* * * * *